bbc news. >> stay with us, if you can, and "bbc world news." still to come -- how indoor air pollution aspects the world's poor. -- affects the world's poor. first though, in many parts of the u.s., 15-year-old can legally drive. in britain, they have to be 17. but what if the newly-qualified were banned from roads at night? chris butler reports. >> after you pass your test, you have to deal with the road. >> it can potentially kill somebody. it is very serious. these young drivers ignore that fact. >> there are claims that many are not properly prepared, even for things like driving in the dark. to combat that, researchers think the driving ban should be considered for teenagers, along with stopping them from carrying on passengers. >> i think the old adage is, what if this happens to me? >> they believe that this would be unworkable. tony davidson's son was killed in an accident. >> they would not be able to carry any of their peers in their car. no one goes out with the intention of injuring or killing themselves, but that is what they are d